SQL Syntax Question ...simple I'm Sure??

Hi I have the following statement, where I'm passing any arrayList (as a string) this works fine, however when I add in the "WHERE" section 'AND (Keywords Like ...)' I get the error "Incorrect syntax ner 'tool' ", must have something to do with '%'

Any help would be great. Thanks in advance

DECLARE @Array varchar(50)
SET @Array = '47, 23'
DECLARE @SearchText varchar(50)
SET @SearchText = 'tool'


DECLARE @SQL varchar(700)

SET @SQL =
'
SELECT     *
FROM         ImageGallery_Items
WHERE CategoryID IN (' + @Array + ')
AND ( Keywords LIKE %' + @SearchText  + '%    )
'

EXEC(@SQL)